<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script type="text/javascript">
			Math.random();
			var num1 = Math.ceil(Math.random()* 90) +10;
			document.write("<br>随机数"+num1);
		</script>
	</body>
</html>
